The amount of time a muscle or movement is loaded during a repetition or set.
Why Time under tension matters
Tempo and set duration can change the training experience, but time alone does not determine exercise quality or muscle growth.
A practical example
Ten controlled repetitions naturally create more time under tension than ten rushed partial repetitions.
Common mistake
Chasing extremely slow repetitions while ignoring load, effort, range and progression.
Keep the context in mind.
Training and nutrition terms describe general principles. The right exercise, intensity or food target still depends on your experience, health, goals and schedule.
Personalised coaching
Apply the principle to your own training.
A definition is useful, but your programme still needs to match your experience, schedule, recovery and goals.
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